Reunite PanelStrip::AddPanel and its internals.

chrome/browser/ui/panels/panel_strip.h

Index: chrome/browser/ui/panels/panel_strip.h
diff --git a/chrome/browser/ui/panels/panel_strip.h b/chrome/browser/ui/panels/panel_strip.h
index ca35100a141c323e63d227e72cebe5435e00ed10..cc13a13ce5bcd18e803b035558177735b1506ea1 100644
--- a/chrome/browser/ui/panels/panel_strip.h
+++ b/chrome/browser/ui/panels/panel_strip.h
@@ -101,10 +101,6 @@ class PanelStrip : public PanelMouseWatcherObserver {
     BRING_DOWN
   };
 
-  // Helper functions to add a panel to the strip.
-  void AddNewPanel(Panel* panel);
-  void AddExistingPanel(Panel* panel);
-
   // Keep track of the minimized panels to control mouse watching.
   void IncrementMinimizedPanels();
   void DecrementMinimizedPanels();
@@ -182,9 +178,6 @@ class PanelStrip : public PanelMouseWatcherObserver {
   // Owned by MessageLoop after posting.
   base::WeakPtrFactory<PanelStrip> titlebar_action_factory_;
 
-  // Factory used for moving new panels to overflow after a delay.
-  base::WeakPtrFactory<PanelStrip> overflow_action_factory_;
-
   static const int kPanelsHorizontalSpacing = 4;
 
   // Absolute minimum width and height for panels, including non-client area.